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강동백(DONG-BAEK KANG),이주원(JUWON LEE),나원배(WON-BAE NA),김정태(JEONG-TAE KIM) 한국해양공학회 2008 韓國海洋工學會誌 Vol.22 No.4
In many cases, open-type plate breakwaters use plates with multiple holes; the holes serve as energy dissipaters and weight reducers. Because of the multi-holes configuration, stress concentration should be considered during the design process. Among several design loading conditions, the loads from a possible collision with a man-made vessel or other unexpected events may damage a multi-perforated steel plate. In that case, the structural behavior of a multi-perforated steel plate is quite significant, and is not well understood. This study presents a collision analysis for a multi-perforated steel plate. First, four different perforation topologies (three with circles and one with squares) were selected to investigate the effect of different hole shapes on the structural response. Second, the wave force at a specific site was calculated and loaded onto a steel plate as a static load. The static stresses were used for reference values. Third, two rigid body impacters (cubical ? cylindrical) were applied to the steel plates to investigate the transient stress responses. In addition, two different impacting angles (45° ? 90°) were selected to investigate the angle effect. From the collision analysis, the significance of the transient stresses was emphasized.
혼합 간세포-담관암 환자에서 담관암에 의한 전이성 소장 천공
강동백(Dong Baek Kang),김승호(Seung Ho Kim),변승재(Seung Jae Byun),오정택(Jung Taek Oh),박원철(Won Cheol Park),김강득(Kang Deuk Kim),조향정(Hyang Jeong Jo),이정균(Jeong Kyun Lee) 대한외과학회 2009 Annals of Surgical Treatment and Research(ASRT) Vol.77 No.2
Advances in chemotherapy and radiation therapies for malignant tumors have resulted in the identifications of various novel features of intestinal metastasis. The common causes of small bowel metastasis are malignant melanoma and lung cancer, and this has also been rarely reported to uterine cervical cancer, malignant lymphoma of the larynx, malignant lymphoma of soft palate, and hepatocellular carcinoma (HCC). The Combined HCC cholangiocarcinoma (HCC-CC) is a rare primary liver malignancy, and is composed of cells with the histopathological features of both HCC and CC, but metastatic small bowel perforation by CC in a patient with combined HCC-CC has not been reported previously. The authors describe the case of a 51-year-old man with a metastatic small bowel perforation caused by an intrahepatic CC in combined HCC-CC with a review of the literature.
강동백 ( Dong Baek Kang ),김승호 ( Seung Ho Kim ),오정택 ( Jung Taek Oh ),김훈영 ( Hun Young Kim ) 대한산부인과학회 2009 Obstetrics & Gynecology Science Vol.52 No.4
Gossypiboma is referred to as surgical gauze or sponge left in the body of a patient inadvertently following surgery. There are two types of foreign body reaction in the body. The first type is exudative, with the resultant formation of an abscess with or without bacterial invasion and usually causes related clinical symptoms shortly after surgery. The second type is aseptic with extensive adhesions and encapsulating in a foreign body granuloma. Gossypiboma typically have an inconsistent radiologic appearance determined by the time, the type of material and the anatomical location. Furthermore, radio-opque markers are sometimes disintegrated or fragmented over times and ultrasound or CT may be indistinguishable from intra-abdominal abscess or tumor. We report 71-year-old woman in whom gossypiboma is severely adherent with ileal loop caused by pelvic mass.
강동백 ( Dong Baek Kang ),오정택 ( Jung Taek Oh ),박원철 ( Won Cheol Park ),이정균 ( Jeong Kyun Lee ) 대한소화기학회 2010 대한소화기학회지 Vol.56 No.3
Anisakiasis usually occurs in the stomach and can easily be diagnosed by digestive tract endoscopy as opposed to enteric anisakiasis which is very rare and difficult to be diagnosed definitively. The most important and useful tool in diagnosing enteric anisakiasis is obtaining an accurate patient history of having eaten raw fish before the onset of symptoms. We report a case of small bowel obstruction caused by acute invasive enteric anisakiasis. A 60-year-old woman visited the emergency room suffering from sudden abdominal pain. She had eaten raw fish 1 day before the onset of symptom. Radiologic studies showed small bowel obstruction. However, no definitive cause could be found. An emergency laparotomy revealed edematous and dilated proximal jejunum and a focal stenosis of the distal jejunum. Segmental resection of the jejunum was performed, and histopathological examination revealed enteric anisakiasis. The patient was discharged on the 7th day after surgery following an uneventful course of recovery. (Korean J Gastroenterol 2010;56:192-195)
강동백(Dong Baek Kang),김승호(Seung Ho Kim),오정택(Jung Taek Oh),박원철(Won Cheul Park),이정균(Jeung Kyun Lee),김헌수(Hun Soo Kim) 대한외과학회 2007 Annals of Surgical Treatment and Research(ASRT) Vol.73 No.2
Schwannoma is a common soft tissue tumor, but it appears to be rare among the spindle cell mesencymal tumors of the gastrointestinal tract. Gastrointestinal Schwannomas (GIS) are rare and most of them originate in the stomach or the small bowel. GIS of the colon is extremely rare. The most important issue to be addressed for this type of tumor is the difficulty in making the correct preoperative diagnosis. Less than 10% of cases have been diagnosed as schwannoma preoperatively. A 58-year-old man was found to have a 3.5㎝ sized submucosal transverse colon tumor on the preoperative colonoscopy, abdominal CT and MRI. Wedge resection was done and the submucosal mass was diagnosed as schwannoma on the immunochemical staining. The immunochemical results were negative staining for CD 117(KIT) and CD 34 and positive staining for S-100 protein, which is all consistent with schwannoma. We report here on the first case of colonic schwannoma in Korea, along with a review of the literature.
성인에서 회장말단의 원발성 림프종에 의한 장중첩증 경험
정금오(Gum Oh Chung),강동백(Dong Baek Kang),오정택(Jung Teak Oh),조향정(Hyang Jeong Jo) 대한외과학회 2007 Annals of Surgical Treatment and Research(ASRT) Vol.72 No.3
Most intussusceptions occur in children and no etiologic factor can be determined in most cases. In contrast, adult intussusception is rare and many cases in adults are generally related to neoplasm such as lymphoma, carcinoid tumor, malignant tumor, sarcoma, benign tumor and congenital abnormalities. Intussusception in adults that’s due to primary malignant lymphoma of the terminal ileum is a rare clinical condition. We describe here two cases of ileocolonic-type intussusception that were due to primary malignant lymphoma of the terminal ileum. The clinical, radiographic and pathologic finding are described along with a brief review of the literature.
위암 발생의 민감성과 RNase3 유전자 다형성과의 연관성
구자욱(Ja Wook Koo),강동백(Dong Baek Kang),박원철(Won Cheol Park),이영환(Young Hwan Lee),강인홍(In Hong Kang),채수천(Soo Cheon Chae),이정균(Jeong Kyun Lee) 대한외과학회 2010 Annals of Surgical Treatment and Research(ASRT) Vol.78 No.5
Purpose: RNase3 is a secretory ribonuclease, which is found in the eosinophilic leukocyte and involved in the innate immune system. Its cytotoxic activity is effective against a wide range of pathogens. We performed a case-control study to examine the relationship between RNase3 polymorphisms and the susceptibility of gastric cancer in Korean people. Methods: Blood sampling of stomach cancer and healthy persons groups were performed, Taqman in g.-550A>G, polymerase chain reaction-restriction fragment length polymorphism in g.371C>G, and high-resolution melt in g.499C>G were analyzed. The three single nucleotide polymorphisms g.-550A>G, g.371C>G, and g.499C>G in RNase3 and their haplotypes were analyzed. Results: The genotype and allele frequencies of RNase3 g.-550A>G and g.371C>G were not significantly increased in susceptibility of gastric cancer than control group. But, RNase3 CC genotype was associated with a significantly increased susceptibility of gastric cancer than control group (P=0.002). Also, RNase3 CC genotype was more specifically associated with a significantly increased susceptibility of middle and lower gastric cancer than upper gastric cancer (P=0.002). In haplotype of RNase3 SNP g.-550A, g.371G, and g.499C, there was significantly susceptibility of gastric cancer (P=0.004), and more specific influence on middle and lower gastric cancer than upper gastric cancer (P=0.006 vs 0.054). Conclusion: RNase3 g.499C>G polymorphism may influence gastric cancers, and have a more specific influence on middle and lower gastric cancer rather than upper gastric cancer. But RNase3 g.-550A>G, g.371C>G polymorphisms need careful interpretation and confirmation in more larger studies.